January weather forecastAllentown, PA
January
Weather in January
In Allentown, January is known for its chilly temperatures. Notably, it has the lowest monthly temperatures, ranging from 21.6°F (-5.8°C) to 34°F (1.1°C). The cool embrace of winter can be felt with likely snowfall, totaling about 3.15" (80mm), and an average of 5 snowy days. Gusty winds accompany the snow, making it feel colder than it already is. With few sunny days and short daylight hours, indoor activities are favored this time of the year.Temperature
January, having an average high-temperature of 34°F (1.1°C) and an average low-temperature of 21.6°F (-5.8°C), is the coldest month in Allentown.Humidity
In January, the average relative humidity is 78%.Rainfall
In January, the rain falls for 6.7 days. Throughout January, 1.81" (46mm) of precipitation is accumulated. In Allentown, during the entire year, the rain falls for 145.1 days and collects up to 27.24" (692mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Allentown, in January, snow falls for 5 days, with typically accumulated 3.15" (80mm) of snow. Throughout the year, in Allentown, there are 20.4 snowfall days, and 13.82" (351mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 40min.On the first day of January, sunrise is at 7:25 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 5:17 pm EST.
Sunshine
In January, the average sunshine in Allentown is 4.7h.UV index
The months with the lowest UV index in Allentown are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 2 in January translates into the following instructions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Allentown, PA
- Average high temperature in January: 34°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in January: 21.6°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in January
Allentown, PA
- Average pressure in January: 30.08"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in January
Allentown, PA
- Average wind speed in January: 7.9mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in January
Allentown, PA
- Average humidity in January: 78%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall in January
Allentown, PA
- Average rainfall in January: 1.81"
The wettest month (with the highest rainfall) is July (3.03").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in January
Allentown, PA
- Average rainfall days in January: 6.7 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (6.7 days).
Average snowfall in January
Allentown, PA
- Average snowfall in January: 3.15"
The month with the highest snowfall is March (4.37").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Allentown, PA
- Average snowfall days in January: 5 days
The month with the highest number of snowfall days is February (6.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Allentown, PA
- Average daylight in January: 9h and 42min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 4h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in January
Allentown, PA
- Average sunshine days in January: 20.5 days
The month with the most sunshine days is January (20.5 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in January
Allentown, PA
- Average UV index in January: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in January
Allentown, PA
- Average cloud cover in January: 48
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in January
Allentown, PA
- Average visibility in January: 5mi
The months with the highest visibility are April, July and November (6mi).
The months with the lowest visibility are January, February, March, May, June, August, September, October and December (5mi).
